Technical Guide
EDM White Layer Guide
Review EDM White Layer Guide in relation to material behavior, tolerance, surface finish and inspection planning before sending drawings.
EDM Feasibility Notes
We review EDM feasibility for the selected material using the drawing geometry, conductive material condition, tolerance, surface finish, quantity and inspection requirements.
Technical Explanation
This guide helps prepare EDM drawings by reviewing material conductivity, process access, tolerance, surface finish and inspection requirements.
Project question: EDM White Layer
Recast Layer / Surface Integrity Notes
Surface integrity, recast layer, micro-crack risk, post-processing and inspection depend on the material, EDM process, geometry and machine setup.
Technical Review Checklist
| Concept | EDM White Layer Guide |
|---|---|
| How we use this guide | We use these points to discuss EDM process fit before confirming the production approach. |
| Drawing review | We confirm material conductivity, feature access, geometry, thickness, tolerance, surface finish and inspection method from your drawing. |
| Project details | Please include drawings, material grade, critical dimensions and any required inspection or surface-integrity controls. |
Inspection and Capability Reference
Inspection planning may include dimensional measurement, optical measurement, surface roughness checks and report requirements according to the drawing.
Technical Note
Use this technical guide to prepare your drawing and key requirements, then contact our team when you need project-specific EDM review.
Need help reviewing an EDM drawing?
Send a drawing question, material details and key requirements for technical review.
- Drawing or part sketch
- Material grade
- Thickness / part size
- Quantity
STEP/STP, DXF, DWG, PDF, IGS/IGES or ZIP.
Confidential drawing review. NDA support available on request.
Frequently Asked Questions
What is a recast layer in EDM?
A recast layer is a thermally affected surface layer that can form during EDM and may need review for critical surfaces.
When should recast layer be reviewed?
It should be reviewed when the part has fatigue, sealing, medical, aerospace, mold, tool or precision functional requirements.
Can post-processing reduce surface-integrity risk?
Depending on the part, polishing, lapping, passivation or other finishing steps may be reviewed to manage surface requirements.
What drawing notes help surface-integrity review?
Include critical surfaces, surface roughness, post-processing, inspection and any metallurgical or surface-integrity requirements.
Which applications need closer surface review?
Parts with fatigue, sealing, wear, medical, aerospace, tooling or high-precision functional surfaces usually need closer review.